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Goodwill And Intangible Assets, Net (Carrying Value And Accumulated Amortization Of Intangible Assets) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Jun. 30, 2021
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Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, Gross carrying value | $ 15,857 | $ 16,760 |
Accumulated amortization | (15,536) | (16,403) |
Total future estimated amortization expense | 321 | 357 |
Total intangible assets, Net carrying value | 321 | 357 | [1]
Customer Relationships [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, Gross carrying value | 9,782 | 10,340 |
Accumulated amortization | (9,782) | (10,340) |
Total future estimated amortization expense | 0 | 0 |
Software And Unpatented Technology [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, Gross carrying value | 1,633 | 1,726 |
Accumulated amortization | (1,633) | (1,726) |
Total future estimated amortization expense | 0 | 0 |
FTS Patent [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, Gross carrying value | 2,535 | 2,679 |
Accumulated amortization | (2,535) | (2,679) |
Total future estimated amortization expense | 0 | 0 |
Trademarks And Brands [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, Gross carrying value | 1,907 | 2,015 |
Accumulated amortization | (1,586) | (1,658) |
Total future estimated amortization expense | $ 321 | $ 357 |
[1] | Derived from audited financial statements.

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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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